diff --git a/gen/generator.go b/gen/generator.go
index cae11b6..f4312f6 100644
--- a/gen/generator.go
+++ b/gen/generator.go
@@ -390,9 +390,6 @@ func isUpper(b byte) bool {
 	return b >= 65 && b <= 90
 }
 
-func isNumeric(b byte) bool {
-	return b >= 48 && b <= 57
-}
 // convert HTTPRestClient to httpRestClient
 func lowerFirst(s string) string {
 	if s == "" {